four bells toll together at 8a.m. they toll after 7,8,11 and 12 seconds respectively. After how much time will they toll together. Please explain as soon as possible
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LCM of 7s , 8s ,11s ,12 is : 7 * 2 *2*2 *11 * 3 = 1848 sec = 30 min and 48 seconds. so we add 30 m 48 sec to the previous time instant that they tolled together.
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